ANATOMY OF THE HEART || BLOOD FLOW INSIDE THE HEART || PULMONARY CIRCULATION || SYSTEMIC CIRCULATION

Your heart is the main organ of your cardiovascular system, a network of blood vessels that pumps blood throughout your body. It also works with other body systems to control your heart rate and blood pressure. The heart is a fist-sized organ that pumps blood throughout your body. It's the primary organ of your circulatory system.
Your heart contains four main sections (chambers) made of muscle and powered by electrical impulses.